A stereoscopic display device compatible with 2D image display

Abstract

The present invention proposes a stereoscopic display device compatible with 2D image display. The stereoscopic display device compatible with 2D image display is composed of a light source bar array, a liquid crystal display panel, a cylindrical lens grating, a first camera and a second camera. The light source bars in the light source bar array can be lit to provide light energy for display, and the light emitted by the light source bar array can be projected by the cylindrical lens grating and converged to a point in space. The liquid crystal display panel provides a parallax image for display. The first camera and the second camera are used to identify and determine the right eye position of the viewer of the stereoscopic image. After the viewer's right eye position is determined, the present invention can project the right parallax image at this position in a first time slot to form a right viewpoint, and project the left parallax image at the remaining positions in a second time slot, so that the left and right eyes of the stereoscopic image viewer can see the left and right parallax images respectively to form a stereoscopic vision, and viewers at other positions can only see the left parallax image, that is, a 2D image.

Description

Technical Field

[0001] The present invention relates to display technology, and more particularly, to stereoscopic display technology. Background Art

[0002] 3D display technology is a display technology that can achieve the true reproduction of stereoscopic scenes. It can provide different parallax images for the human eye, so that people can have stereoscopic vision. Traditional 3D display devices project corresponding parallax images at different viewpoints in space through the coupling of pixels and spectroscopic elements. The parallax images corresponding to each viewpoint are different, so traditional 3D display devices can only provide stereoscopic images to viewers, and cannot provide 2D image display to some users who have 2D image requirements while providing 3D stereoscopic images. Therefore, the present invention proposes a stereoscopic display device compatible with 2D image display. Summary of the invention

[0003] The present invention provides a stereoscopic display device compatible with 2D image display. Figure 1 The structure diagram of the stereoscopic display device compatible with 2D image display is shown in FIG. The stereoscopic display device compatible with 2D image display is composed of a light source bar array, a liquid crystal display panel, a cylindrical lens grating, a first camera and a second camera.

[0004] The light source bar array is composed of light source bars arranged in a horizontal direction. The light source bars can be lit to provide light energy for display.

[0005] The cylindrical lens grating is placed in front of the light source bar array. The light emitted by each light source bar can be projected by the cylindrical lens grating. Multiple light source bars in the light source bar array can be projected by the cylindrical lens grating and converged to a point in space.

[0006] The liquid crystal display panel is used to provide a parallax image for display.

[0007] The first camera and the second camera are used to identify and determine the position of the right eye of the stereoscopic image viewer by photographing the right eye of the stereoscopic image viewer and using the position of the right eye of the stereoscopic image viewer in the two images photographed by the first camera and the second camera to determine the orientation of the right eye of the stereoscopic image viewer.

[0008] After the right eye position of the stereoscopic image viewer is determined, the stereoscopic display device compatible with 2D image display performs stereoscopic image display compatible with 2D images in time division multiplexing. Specifically, the display process is divided into two time slots. In the first time slot, in the light source bar array, each light source bar corresponding to the right eye position of the stereoscopic image viewer is turned on, and the remaining light source bars are turned off, and the liquid crystal display panel provides a right parallax image. At this time, a viewpoint can be formed at the right eye position of the stereoscopic image viewer, and the right parallax image is displayed, and no image is displayed at the remaining positions; in the second time slot, in the light source bar array, each light source bar corresponding to the right eye position of the stereoscopic image viewer is turned off, and the remaining light source bars are turned on, and the liquid crystal display panel provides a left parallax image. At this time, no image is displayed at the right eye position of the stereoscopic image viewer, and the left parallax image is displayed at the remaining positions.

[0009] In the first time slot, the right eye of the stereoscopic image viewer can see the right parallax image, while the left eye cannot see any image; in the second time slot, the right eye cannot see any image, while the left eye can see the left parallax image. Thus, the left and right eyes of the stereoscopic image viewer can see the corresponding parallax images respectively, thus generating stereoscopic vision.

[0010] For other 2D image viewers, as long as their right eye position does not overlap with that of the stereo image viewer, their left and right eyes cannot see the right parallax image in the first time slot; in the second time slot, their left and right eyes can only see the left parallax image. Because the images seen by their left and right eyes are the same, they can only see 2D images without parallax.

[0011] Optionally, the stereoscopic image viewer may be determined by common methods such as face recognition, position interval definition, etc. which are beyond the protection scope of the present invention.

[0012] Optionally, the right eye position of the stereoscopic image viewer can be determined by shooting with the first camera and the second camera, and calculating the displacement of the right eye target in the images captured by the first camera and the second camera, etc., using common algorithms outside the scope of protection of the invention.

[0013] Optionally, the first camera and the second camera may also identify and determine the left eye position of the stereoscopic image viewer, and enable the liquid crystal display panel to provide a left parallax image in a corresponding time slot.

[0014] Optionally, the order of the first time slot and the second time slot may be swapped.

[0015] Optionally, the rod lens grating can be replaced by a slit grating.

[0016] In summary, since a stereoscopic display device compatible with 2D image display of the present invention provides a parallax image at the position of one eye of a stereoscopic image viewer and provides another parallax image at all spatial positions except this position, only the stereoscopic image viewer can see the stereoscopic image, and viewers at other positions can only see 2D images, thereby achieving stereoscopic display compatible with 2D image display. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is a schematic diagram of the present invention being displayed in the first time slot.

[0020] Figure 3 It is a schematic diagram showing the present invention in the second time slot.

[0021] Icons: 010 - a stereoscopic display device compatible with 2D image display; 020 - right parallax image display optical path; 030 - left parallax image display optical path; 100 - light source bar array; 110 - light source bar periodic unit; 200 - liquid crystal display panel; 300 - cylindrical lens grating; 410 - first camera; 420 - second camera.

[0022] It should be understood that the above drawings are only schematic and are not drawn to scale. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings. Example

[0026] Figure 1 The structure diagram of a stereoscopic display device 010 compatible with 2D image display provided in this embodiment. In the figure, the x coordinate represents the horizontal direction in space, the y coordinate represents the vertical direction in space, and the z coordinate represents the direction perpendicular to the xy plane. The stereoscopic display device 010 compatible with 2D image display is composed of a light source bar array 100, a liquid crystal display panel 200, a cylindrical lens grating 300, a first camera 410 and a second camera 420.

[0027] The light source bar array 100 is composed of light source bars arranged in a horizontal direction. The light source bars are composed of organic light emitting diodes, which can be conveniently made into a slender structure and are lit to provide light energy for display.

[0028] The cylindrical lens grating 300 is placed in front of the light source bar array 100. The light emitted by each light source bar can be projected by the cylindrical lens grating 300. Figure 2 The spatial position of each light source bar is precisely coupled with the position of the cylindrical lens grating 300. In all the light source bar periodic units 110, the light emitted by the light source bar at the same position can be projected by the cylindrical lens grating 300 and then converged to a point in space.

[0029] The liquid crystal display panel 300 is used to provide a parallax image for display.

[0030] The first camera 410 and the second camera 420 are used to identify and determine the right eye position of the stereoscopic image viewer. Figure 1 .

[0031] A specific implementation method is as follows: the first step is to determine whether the viewer is a stereoscopic image viewer. The first camera 410 and the second camera 420 take photos of the viewer at the same time. When the viewer is in different positions, his position in the images taken by the first camera 410 and the second camera 420 should also be different. Now a pixel area is defined in the captured image, and when the viewer's image is within the pixel area, he is determined to be a stereoscopic image viewer. The second step is to determine the spatial position of the right eye of the identified stereoscopic image viewer. Please refer to Figure 1, because the first camera 410 and the second camera 420 are displaced in the horizontal direction, the images captured by them should have parallax, that is, the pixel positions of the right eye of the stereoscopic image viewer in the two images captured by the first camera 410 and the second camera 420 are different. The average value of the horizontal position of the right eye of the stereoscopic image viewer in the two pictures determines the direction of the right eye of the stereoscopic image viewer; the difference in the horizontal coordinates of the pixels of the right eye of the stereoscopic image viewer in the two pictures, that is, the size of the parallax, determines the distance from the viewer to the screen. Specifically, the farther the right eye of the stereoscopic image viewer is from the screen, the smaller the parallax; the closer the right eye of the stereoscopic image viewer is to the screen, the larger the parallax. Therefore, the first camera 410 and the second camera 420 can determine the position of the viewer's right eye.

[0032] Another specific implementation method for determining a stereoscopic image viewer is as follows: First, determine whether the viewer is a stereoscopic image viewer. The first camera 410 and the second camera 420 simultaneously take photos of the viewer. Perform target recognition on the captured viewer image, and if the image features of the viewer match the image features of the viewer that has been pre-registered as a stereoscopic image viewer, determine that the viewer is a stereoscopic image viewer.

[0033] The remaining viewers may be regarded as 2D image viewers.

[0034] It is worth noting that the above-mentioned method and process for determining the stereoscopic image viewer is a common technical method and is not included in the protection scope of the present invention. In addition, there may be other methods to achieve the above-mentioned function.

[0035] After the right eye position of the stereoscopic image viewer is determined, the stereoscopic display device 010 compatible with 2D image display performs stereoscopic image display compatible with 2D images in time division multiplexing. Specifically, the display process is divided into two time slots.

[0036] Please refer to the display principle of the first time slot Figure 2In the light bar array 100, each light bar periodic unit 110 has 6 light bars, so it can provide 6 different viewing positions in space. The second light bar from the left in the light bar periodic unit 110 corresponds to the right eye position of the current stereoscopic image viewer in the figure. When the right eye of the stereoscopic image viewer is at this position and is detected by the first camera 410 and the second camera 420, the second light bar from the left in each light bar periodic unit 110 is turned on, and the remaining light bars are turned off. At this time, the light emitted by all the lit light bars can be projected to the right eye position of the current stereoscopic image viewer after being converged by the cylindrical lens grating 300. At the same time, the liquid crystal display panel 200 provides a right parallax image corresponding to the right eye of the stereoscopic image viewer, so that the present embodiment can form a viewpoint at the right eye position of the stereoscopic image viewer and display the right parallax image. At the remaining spatial positions, since no light bar corresponding to its position is turned on, there is no light energy support for display, so no image is displayed.

[0037] For the display of the second time slot, please refer to Figure 3 In the light source bar array 100, the second light source bar from the left in each light source bar periodic unit 110 is turned off, and the remaining five light source bars are turned on. The liquid crystal display panel 200 provides a left parallax image. At this time, the right eye position of the stereoscopic image viewer cannot provide light energy for display because the second light source bar from the left in each light source bar periodic unit 110 is turned off, so no image is displayed, and the remaining five positions display the left parallax image.

[0038] In summary, in the first time slot, the right eye of the stereoscopic image viewer can see the right parallax image, and the left eye cannot see any image; in the second time slot, the right eye cannot see any image, and the left eye can see the left parallax image. Therefore, the left and right eyes of the stereoscopic image viewer can see the corresponding parallax images respectively, thereby generating stereoscopic vision. For other 2D image viewers, as long as their right eye position does not overlap with that of the stereoscopic image viewer, their left and right eyes cannot see the right parallax image in the first time slot; and in the second time slot, both left and right eyes can only see the left parallax image. Because the images seen by their left and right eyes are the same, they can only see 2D images without parallax. Therefore, this embodiment can achieve stereoscopic display compatible with 2D image display.

Claims

1. A stereoscopic display device compatible with 2D image display, characterized in that: The stereoscopic display device compatible with 2D image display is composed of a light source bar array, a liquid crystal display panel, a cylindrical lens grating, a first camera and a second camera. The light source bar array is composed of light source bars arranged in a horizontal direction. The light source bars can be lit to provide light energy for display. The cylindrical lens grating is placed in front of the light source bar array. The light emitted by each light source bar can be projected by the cylindrical lens grating. Multiple light source bars in the light source bar array can be projected through the cylindrical lens grating and converged to a point in space. The liquid crystal display panel is used to provide a parallax image for display. The first camera and the second camera Used to identify and determine the right eye position of a stereoscopic image viewer, in a time-division multiplexed manner, within a first time slot, the stereoscopic display device compatible with 2D image display can form a viewpoint at the right eye position of the stereoscopic image viewer and display a right parallax image, while no image is displayed at other positions; within a second time slot, the stereoscopic display device compatible with 2D image display can display a left parallax image at other positions, while no image is displayed at the right eye position of the stereoscopic image viewer, thereby providing left and right parallax images for the left and right eyes of the stereoscopic image viewer, respectively, to form stereoscopic vision, and viewers at other positions can only see the left parallax image, i.e., the 2D image.

2. A 3D display device compatible with 2D image display as claimed in claim 1, characterized in that: The present stereoscopic display device compatible with 2D image display is replaced by identifying the left eye of the stereoscopic image viewer and providing a left parallax image at that position in a first time slot, and displaying a right parallax image at the remaining positions in a second time slot.

3. A 3D display device compatible with 2D image display as claimed in claim 1, characterized in that: The light source bar array is an organic light emitting diode, or the light source bar array is prepared by a light source array and a cylindrical lens grating.

4. The 3D display device compatible with 2D image display according to claim 1, characterized in that: The cylindrical lens grating is replaced by a slit grating.

Images